Trouble with cadence y heart monitor Garmin

Nice day… My English is not good… But a have a question… I’m using the program in my computer, Garmin sensors (cad, heart, spd) and a balance roller.

At beginning everything works ok… The program take cad equal like de Garmin 530 and the Sync are easy and quickly.

After the update I got a lot or trouble with the sync especially with heart monitor… And the cad isn’t equal like my Garmin. The difference is around 25 rpm…

What can I do to fix this trouble.